PRESSURE REGULATOR LBM SERIES

Transcription

1 VIRTUAL CATALOGUE FAIL TO OPEN REGULATOR HIGH FLOW COEFFICIENT WIDE PRESSURE-REGULATION RANGE FAST RESPONSE PRESSURE REGULATOR LBM SERIES FULL SEAL AT ZERO FLOW CAN BE SUPPLIED WITH MINIMUM / MAXIMUM PRESSURE SLAM-SHUT VALVE HIGH PRECISION REGULATION SIMPLE MAINTENANCE; NO NEED TO REMOVE FROM GAS LINE CONNECTIONS DN 25 PN 25 DN 40 PN 25 DN 50 PN 25 1" ANSI /2" ANSI 150 2" ANSI 150 SUITABLE UP TO Pe 20 bar LBM - LBM/S

2 Use Due to their characteristics, LBM series regulators are used with optimum results in industrial facilities where a fast response is required for quick changes in flow. They can work with natural or manufactured gas, propane, air and other gases that do not contain a high percentage of benzol. Construction characteristics LBM series regulators are direct action, with regulation by spring and simple, non balanced valve. The high membrane/core relation offers practical exit pressure stability under strong variations in entry pressure. This series of regulators has been designed with easy, practical maintenance in mind and any element can be substituted without having to remove it from the gas line. The higher flow products come with an anti-pump device in order to slow up the flow and backflow of gas and air in the regulation head. Control operations Movement in the membrane or diaphragm (d) via the lever (p) and shaft (e) is transmitted to the plug (o). The outlet pressure reaches the chamber (c) and increases the force on the membrane (d); this is countered by the decreasing force exercised by the calibration spring (m). The increase in outlet gas pressure in the chamber (c) lifts the membrane (d) and gradually closes off the flow of gas by means of the plug (o). The force exercised by the calibration spring (m) gradually opens the gas flow. The balance between these two forces results in the different flows having a constant outlet pressure. Each variation in flow will tend to increase or decrease the pressure at the outlet, so that the moving system will look for a new balanced position in order to keep the gas pressure at the pre-established setting. VERSIONS Entry Exit Slam-shut Valve r m LBM 25 DN 25 or 1" DN 25 or 1" no LBM 25/S DN 25 or 1" DN 25 or 1" yes LBM 40 DN 40 or 1.1/2" DN 40 or 1.1/2" no LBM 40/S DN 40 or 1.1/2" DN 40 or 1.1/2" yes LBM 50 DN 50 or 2" DN 50 or 2" no LBM 50/S DN 50 or 2" DN 50 or 2" yes EXIT PRESSURE RANGE Ps (bar) LBM p c d e o Setting up the regulator To set up the regulator, create a small consumption by slightly opening the exit valve or a purge valve. Then slowly open the entry valve until it is fully open. Check that the regulator stabilises itself and then slowly open the exit valve until it's fully open. To ensure the regulator operates effectively and has a long service life, the gas reaching the regulator should be perfectly filtered and dry. If the regulator has an incorporated safety shut-off valve: Open the entry valve fully but carefully. Slightly turn the release shaft to open the safety valve's internal by-pass. Check that the exit pressure increases then stabilises at a level close to that of the regulation level, then you will notice that the resistance in the release shaft disappears and you can continue turning until it is totally reset. Then slowly open the exit valve until it is fully open.

3 Adjusting the regulator To increase outlet pressure, the screw (r) must be turned clockwise, compressing the calibration spring (m) until the desired pressure is reached, which should be checked by means of a manometer installed at the outlet zone. To decrease the pressure, the above-mentioned screw (r) should be turned anti-clockwise. APQ supplies the regulator with the settings requested by the client and these values are indicated on both the regulator label and the quality certificate. Safety valve ARM regulators can be supplied with a minimum and/or maximum pressure safety valve, in this case being known as LBM.../S. The function of this valve is to cut off the gas flow when the regulator exit pressure doesn't reach or exceeds the pre-adjusted minimum or maximum pressure values. It contains a by-pass for resetting the safety valve without effort, even in the case of high pressure at the regulator inlet. The safety valve acts totally independently of the regulation parts and can be actuated at minimum pressure, maximum pressure or both. o1 Safety valve operations The outlet pressure arrives at the chamber (c1) via the port and exercises a force on the membrane or diaphragm (d1), gradually moving it. This membrane also undergoes a counterforce exercised by the minimum (m1) and maximum (m2) calibration springs. Under these balanced conditions, the spheres (e1) hold the shaft (f1) with the lock-up plug (o1) mounted at one end. An increase or decrease in exit pressure exceeding the value tolerated by the moving parts makes the spheres move (e1), releasing the shaft (f1) and blocking the flow of gas by means of the plug (o1). Safety adjustment limits c1 e1 d1 m2 m1 Reset of the safety valve Actuation pressure in mbar By minimum By maximum S-BP S-MP S-AP r2 r1 f1 t1 To reset the safety valve, remove the plastic top (t1) and, inverting it, screw it onto the end of the shaft (f1). Then pull slowly; checking that the gas passes through the regulator and that the exit pressure rises slowly, reaches the regulation pressure and then stabilises. Continue pulling until the end and, after checking that the valve is reset, unscrew the shaft top (t1) and, inverting it, screw it onto the top of the lock-up valve so that it will protect the safety valve controls. Setting the safety valve The safety valve is adjusted at the factory at the value indicated on the label of the valve itself and on the quality certificate. Should you wish to modify the value of the safety maximum or minimum, proceed as described below: If the safety valve has a minimum setting, you should always start with this. Turn the minimum screw (r1) clockwise to increase the minimum value and anti-clockwise to reduce it. If you wish to cancel the minimum, simply remove the minimum spring. To set the safety maximum, turn the dial (r2) clockwise to increase the value and anti-clockwise to reduce it. To cancel the safety maximum, turn the dial (r2) clockwise to a value where actuation would be illogical.

4 TECHNICAL CHARACTERISTICS Body design pressure 20 bar Servo. design pressure 4 bar Maximum entry pressure 6 bar Maximum exit pressure 4000 mbar Minimum exit pressure 10 mbar Regulation accuracy RG 5 Closure surge SG 10 Entry connection Flanges DIN or ANSI 150 Exit connection Flanges DIN or ANSI 150 Operational temperature -10º 50 ºC I MATERIALS Regulator body Servomotor body LBM 25 Servomotor body LBM 40 Servomotor body LBM 50 Balanced valve Valve seat Membranes Joints Shut-off valve cover Shaft Spheroid cast iron Injected aluminium Pressed steel Pressed steel Vulcanised brass Brass Woven nitrile Nitrile Injected aluminium Steel K I DIMENSIONS Regulator Connection Entry/Exit LBM 25 DN 25 or 1" 210/ /2" ,0 Kg LBM 25/S DN 25 or 1" 210/ /2" ,0 Kg LBM 40 DN 40 or 1.1/2" 280/ /2" ,0 Kg LBM 40/S DN 40 or 1.1/2" 280/ /2" ,0 Kg LBM 50 DN 50 or 2" 280/ /2" ,0 Kg LBM 50/S DN 50 or 2" 280/ /2" ,0 Kg The measurements are in mm C = Distance required from pipe axis to change regulation springs Flow conversion A B C D E F G I J K Seat Ø Ø Ø Ø E = Distance required from pipe axis to change safety springs For other gases, the flow must be converted to natural gas, in accordance with the following formula: Nm 3 /h natural gas = Nm 3 /h gas to be converted / factor f of gas to be converted Weight Conversion factor f Butane 0.55 Methane 1.08 Propane 0.64 City gas 1.23 Bio gas 0.85 Oxygen 0.76 Air 0.80 Nitrogen 0.81 Carbon Monoxide 0.81 Hydrogen 3.04 Choice of regulator The regulator must be chosen in accordance with the flow requested, taking into account for this choice the desired flow, the necessary exit pressure and the entry pressure. For regulators used in on-off installations, it is good practice to calculate the regulator with an extra margin of 10%. To maintain the RG 5, do not exceed 85% of the value of the maximum flow calculated.

5 INSTALLATION a) Install in a gas line that is sufficiently strong to bear the weight of the regulation unit. b) Ensure that there is a cut-off valve, a manometer with the suitable range and filter at the entry point. c) Ensure that there is a manometer with the suitable range, a 1/2" port and cut-off valve at the exit point. d) Install the regulator following the flow indicated on the regulator body. e) Verify that the port outlet pressure in the pipe is at least 5 times the pipe diameter from the outlet flange of the regulator. f) Verify that the gas entry speed and especially exit speed do not exceed that requested or recommended by the gas company. In no case should the speed exceed 40 m/sec. g) In fast switch-off installations with on-off electro valves, the exit bag must be the correct size and at least 0.2% of the flow in Nm 3 /h. h) Ensure that the pipe has been cleaned of earth, sand, solder remains, etc. 5x 5x 5x 7x PORTS GOOD GOOD BAD The data contained in this catalogue may be modified without prior notice to ensure the ongoing improvement of the product. Ctra. de Ripollet 51, Polígono Foinvasa Montcada i Reixac (Barcelona) Spain Tel: Fax: apq@apq.cc -